Unit 1

Introduction to different aerospace structures, loads on an aircraft, characteristics of aircraft structures, basic structural members in aircraft structures and their functions; Torsion in non-circular bars, Prandtl stress function, St. Venant warping function, membrane analogy, torsion in narrow rectangular section.

Unit 2

Euler – Bernoulli and Timoshenko beam theories, bi-directional bending, bending and transverse shear stresses, bending stresses in narrow rectangular section, general symmetric sections, and thin-walled sections, flexural shear flows (FSF), FSF in thin-walled open sections, shear center in open sections.

Unit 3

Torsional shear flows (TSF) in thin-walled open sections, TSF in thin-walled closed sections (single and multiple cells) and warping in open and closed thin-walled sections, Combined flexural and torsional shear flows in thinwalled closed sections (single and multi-cells) and shear center in closed sections, buckling of non-symmetrical sections and buckling of thin-walled sections

Objectives

• To study and analyze the behavior of various thin-walled aerospace structural components under different load conditions.

Course Outcomes

• CO1: Understand the aircraft structures.
• CO2: Analysis of non-circular torsional members
• CO3: Evaluate the bending stresses and flexural shear flows in thin walled sections
• CO4: Investigate the torsional shear flows in thin walled sections
• CO5: Illustrating the concepts of buckling for thin walled sections.

CO – PO Mapping

Textbook(s)

• C. T. Sun, “Mechanics of Aircraft structures”, John Wiley & sons, New York, 2006.

Reference(s)

• Megson,T.H.G., “Aircraft Structures for Engineering Students”, Butterworth-Heinemann, USA, 2007
• Peery, D.J., and Azar, J.J., “Aircraft Structures”, 2^nd edition, McGraw–Hill, New York, 1993.
• Bruhn. E.H. “Analysis and Design of Flight vehicles Structures”, Tri – state off set company, USA, 1985.
• Rivello, R. M., “ Theory and analysis of flight structures” McGraw-Hill, New York,1969.

Evaluation Pattern